How to setup clustered LVM as shared VM storage?
This HowTo is about how to set up a shared storage space for VM virtual disks using clustered LVM (CLVMD). CLVMD (Clustered LVM Daemon) is a service which runs on top of regular LVM. It is using the “CMAN” HA-framework for the cluster communications.
How are VMS replicated in a KVM cluster?
Each VM is replicated and automatically restarted independently. Some VMs can run on the first KVM server and are replicated and restarted on the second KVM server. Other VMs can run on the second KVM server and are replicated and restarted on the first KVM server.
Where are the storage volumes stored in KVM?
As a default, there is one storage pool which called “ Default ” uses the rootfs partition to store vm’s volumes under /var/lib/libvirt/images path. In many cases, its not recommended to use this pool, just to make this free space for your system.
Which is the best KVM cluster with high availabity?
Evidian SafeKit brings high availability to KVM between two redundant servers. This article explains how to implement quickly a KVM cluster without shared disk and without specific skills. The high availabity module kvm.safe and a free trial are offered in the Installation tab below.
How to view logical volumes inside a KVM?
Inside the VM guest, logical volumes are seen as hard disks, but if you are trying to view the files inside the LVM partition from the KVM host outside the VM, I believe you’d need to use the ‘libguestfs’ tool. Check out this author’s blog. He’s well-versed with libvirt.
Can a VM use the same disk as a LVM?
But with a standard file system this is not possible and has nothing to do KVM or LVM. An other solution would be to use a network filesystem like nfs or cifs. A disk used by a vm at the same time.Otherwise,the filesystem on the disk will be damaged!
Which is LVM daemon runs on top of KVM?
CLVMD (Clustered LVM Daemon) is a service which runs on top of regular LVM. It is using the “CMAN” HA-framework for the cluster communications. This howto explains the configuration of 2 (or more) additional bare-metal systems used as KVM virtualization hosts which are configured with a shared clustered LVM volume group.